Extensions are like apps for Firefox.

They add features to Firefox to make browsing faster, safer, or just plain fun.

Recommended extensions
  • HTTPS Everywhere

    HTTPS Everywhere

    Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.

    728,747 users

  • Search by Image

    Search by Image

    A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.

    158,752 users

  • Decentraleyes

    Decentraleyes

    Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.

    199,450 users

  • Google Search Fixer

    Google Search Fixer

    Override the user-agent string presented to Google Search pages to receive the search experience shown to Chrome.

    32,566 users

  • LeechBlock NG

    LeechBlock NG

    LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.

    42,046 users

  • Privacy Possum

    Privacy Possum

    Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.

    94,701 users

  • Dark Reader

    Dark Reader

    Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.

    557,523 users

  • Privacy Badger

    Privacy Badger

    Automatically learns to block invisible trackers.

    957,901 users

  • uBlock Origin

    uBlock Origin

    Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

    4,873,661 users

  • YouTube High Definition

    YouTube High Definition

    YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.

    126,468 users